Recommended Cleanroom Validation Frequency to Meet ISO 14644-1:2015
ISO 14644-1:2015 classifies air cleanliness forairborne particle population levels (ranging from 0,1 µm to 5 µm, lower-limit threshold) in cleanrooms and clean zones; and separative devices – in addition to those defined in ISO 14644‑7.
How often a cleanroom be validated to meet ISO 14644-1:2015?
In ISO 14644-1:2015, particle populations ranging from 0,1 µm to 5 µm (less than the lower-limit threshold) are considered for classification purposes.
Classification is not provided for particle populations outside of the particle population range of lower threshold particle-size range, 0,1 µm to 5 µm.
Light scattering airborne particle counters (LSAPC) are used to identify and count airborne particles that fall within the outlined size threshold in this chapter.
ISO 14644-1:2015 does not classify molecule populaces that are outside the predefined lower limit molecule size reach, 0,1 µm to 5 µm. Convergences of ultrafine (particles littler than 0,1 µm) will be tended to in a different standard to determine air cleanliness by nano-scale particles. A M descriptor (see Annex C) might be utilized to measure populaces of macroparticles (particles bigger than 5 µm).
Chemical, physical, radiological, viable or identifying features of airborne particle are not characterized in ISO 14644-1:2015